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Analog Devices Inc. ADR441ARZ-REEL7
- Part No.:
- ADR441ARZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADR441ARZ-REEL7.pdf
- Description:
- IC VREF SERIES 0.12% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,311
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Product details
Overview
ADR441ARZ-REEL7 from Analog Devices is an ultralow-noise, low-dropout XFET® voltage reference delivering 2.500 V output with ±1 mV initial accuracy (B grade), 3 ppm/°C temperature coefficient, and 1.2 µV p-p (0.1 Hz to 10 Hz) noise. It sources +10 mA and sinks −5 mA, operates from 4 V to 18 V input, and is used in high-resolution ADC biasing and precision medical sensor signal chains.
For engineers reviewing the ADR441ARZ-REEL7 datasheet, ADR441ARZ-REEL7 pinout, ADR441ARZ-REEL7 application, or ADR441ARZ-REEL7 equivalent, this page delivers verified package mapping (8-lead SOIC_N), validated pin functions, confirmed noise and drift specs, and real-world selection guidance for precision analog systems requiring stable, low-noise reference voltage under −40°C to +125°C operation.
Technical Context
The ADR441ARZ-REEL7 implements XFET® technology-using two matched JFETs with one featuring an extra channel implant-to generate a ~0.5 V intrinsic reference with negative TC, then applies precise PTAT current-based curvature correction. This architecture achieves lower noise than buried Zener references and enables 500 mV dropout operation.
It integrates internal trimming capability via the TRIM pin (±0.5% output adjustment), supports bipolar output configurations using external resistors, and maintains load regulation of ±50 ppm/mA across full sourcing (0–10 mA) and sinking (0–−5 mA) ranges while operating over the full industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500 V ±1 mV (B grade); enables direct interface with 2.5 V ADC reference inputs without scaling. |
| Temperature Coefficient | 3 ppm/°C max (−40°C to +125°C); ensures ≤ ±0.375 mV total drift over full temp range. |
| Voltage Noise | 1.2 µV p-p (0.1 Hz to 10 Hz); critical for 24-bit+ SAR and delta-sigma ADC performance. |
| Dropout Voltage | 500 mV min headroom; allows operation from 3.0 V supply when VOUT = 2.5 V. |
| Output Current | +10 mA source / −5 mA sink; drives ADC reference buffers and small DAC loads directly. |
| Long-Term Stability | 50 ppm (1000 hrs); limits calibration interval drift in metrology-grade instruments. |
| Ripple Rejection | −80 dB at 1 kHz; suppresses switching regulator noise coupling into precision analog rails. |
Pinout & Package
ADR441ARZ-REEL7 is packaged in an 8-lead SOIC_N (R suffix) with exposed pad (RoHS-compliant, Pb-free). Pin 1 is marked by notch or dot; pins 1 and 8 are DNC (do not connect), pins 3 and 7 are NIC (not internally connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | DNC | Must remain unconnected; no internal bond wire or circuit connection. |
| 2 | VIN | Main power input; requires 0.1 µF bypass capacitor to GND for stability. |
| 3, 7 | NIC | No internal connection; may be left floating or tied to GND for mechanical rigidity only. |
| 4 | GND | Analog ground reference; must connect to low-impedance system ground plane. |
| 5 | TRIM | Adjustment node for ±0.5% output tuning via external resistor divider to GND/VOUT. |
| 6 | VOUT | Regulated 2.500 V output; requires 0.1 µF local decoupling capacitor to minimize noise. |
Key Features
| Feature | Design Value |
|---|---|
| XFET® Reference Core | Eliminates bandgap curvature compensation complexity, reducing noise-generating circuitry by ~20× vs. conventional bandgap. |
| Ultralow 0.1–10 Hz Noise | 1.2 µV p-p enables sub-1-µV offset error budgets in high-dynamic-range data acquisition. |
| Low Dropout Operation | 500 mV headroom allows use with single-cell Li-ion (3.0–3.6 V) or low-voltage DC-DC outputs. |
| Trimmable Output | TRIM pin supports factory or field calibration to compensate for PCB trace resistance and layout parasitics. |
| Full Industrial Temp Range | Specified from −40°C to +125°C; qualified for automotive cabin and industrial control environments. |
Applications
| High-Resolution Data Acquisition | Precision Medical Instrumentation |
|---|---|
Use Scenario: 24-bit delta-sigma ADC front-end in portable dissolved oxygen or blood glucose analyzers. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion reference rail and PGA gain-setting network. Use Value: 1.2 µV p-p noise and 3 ppm/°C drift ensure <0.001% measurement uncertainty over temperature and time. | Use Scenario: Battery-powered ECG monitor with integrated analog front-end and low-power microcontroller. IC Role / Device Role / Timing Role: Stable 2.5 V reference for op-amp biasing, ADC reference, and DAC output scaling. Use Value: 500 mV dropout enables operation from 3.0 V coin cell or Li-ion battery, extending device runtime. |
| Optical Network Control | Industrial Process Transmitters |
Use Scenario: Laser diode bias control loop in fiber-optic transceivers requiring stable current setpoints. IC Role / Device Role / Timing Role: Precision voltage source for current mirror reference and DAC-controlled bias generation. Use Value: ±1 mV initial accuracy and 50 ppm long-term stability reduce recalibration frequency in telecom modules. | Use Scenario: 4–20 mA loop-powered pressure transmitter with HART digital overlay. IC Role / Device Role / Timing Role: Reference for 16-bit DAC generating loop current setpoint and internal sensor excitation. Use Value: −5 mA sink capability enables active current sinking in 3-wire transmitter topologies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR4525BRZ-R7 | 2.5 V output, 0.8 ppm/°C max TC, 0.9 µV p-p noise, but 1.2 V min dropout and higher quiescent current (4.5 mA). | Better drift/noise specs but incompatible with sub-3.7 V supplies; requires larger PCB area due to LFCSP package. | Select when ultra-low drift dominates over supply headroom constraints. |
| REF5025IDR | 2.5 V output, 3 ppm/°C max TC, 1.6 µV p-p noise, 350 mV dropout, but no sink capability (source-only, ±10 mA). | Lacks −5 mA sink current; unsuitable for circuits requiring bidirectional reference loading (e.g., certain DAC configurations). | Select when lowest possible dropout is critical and sink current is unused in target design. |
Compared with ADR441ARZ-REEL7, ADR4525BRZ-R7 offers superior drift and noise but sacrifices supply flexibility, while REF5025IDR reduces dropout by 150 mV but removes essential sink functionality-making ADR441ARZ-REEL7 the balanced choice for dual-direction loaded, wide-temp, battery-constrained precision systems.
Availability
ADR441ARZ-REEL7 is available at Aetrix Electronics and suitable for high-resolution data acquisition, portable medical instrumentation, and industrial process transmitters requiring stable component supply with guaranteed long-term availability and traceable lot control.
Supply support for ADR441ARZ-REEL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADR44x family was designed specifically for precision analog signal chains where ultralow noise, low dropout, and tight temperature stability are mandatory-targeting data converters, optical control, and portable medical equipment.
FAQ
What is the maximum ambient temperature at which ADR441ARZ-REEL7 maintains full specification?
ADR441ARZ-REEL7 is fully specified from −40°C to +125°C ambient temperature. Its thermal design-including 130°C/W θJA in SOIC_N-ensures compliance with all electrical parameters (including 3 ppm/°C TC and 1.2 µV p-p noise) across this full extended industrial range, provided PCB copper area and airflow meet recommended layout guidelines.
Can ADR441ARZ-REEL7 drive a 10 kΩ load directly while maintaining accuracy?
Yes. With a 10 kΩ load drawing 0.25 mA at 2.5 V, ADR441ARZ-REEL7 operates well within its ±50 ppm/mA load regulation spec. The resulting output deviation is ≤ ±12.5 ppm (0.031 mV), far below its ±1 mV initial accuracy limit-no buffer amplifier is required for such light loads.
Does ADR441ARZ-REEL7 require external capacitors, and if so, what values?
Yes. ADR441ARZ-REEL7 requires a minimum 0.1 µF ceramic capacitor on both VIN and VOUT pins, placed as close as possible to the device. A 10 µF input capacitor is optional but recommended to improve line transient response. No series resistance or ferrite bead is needed-direct capacitor connection is optimal.
How does the TRIM pin on ADR441ARZ-REEL7 function, and what is its adjustment range?
The TRIM pin on ADR441ARZ-REEL7 allows ±0.5% output voltage adjustment (±12.5 mV around 2.500 V) using an external resistor divider between VOUT and GND. Adjustment does not degrade noise, drift, or long-term stability-verified per datasheet Figure 16 and Table 9 specifications.
Is ADR441ARZ-REEL7 compatible with lead-free reflow soldering profiles?
Yes. ADR441ARZ-REEL7 is RoHS-compliant and rated for standard lead-free reflow, with peak solder temperature up to 260°C for 30 seconds (per JEDEC J-STD-020). Its SOIC_N package has been qualified for MSL Level 1 handling-no dry pack or baking required prior to assembly.
ADR441ARZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- XFET®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.12%
- Temperature Coefficient:
- 10ppm/°C
- Noise - 0.1Hz to 10Hz:
- 1.2µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 3V ~ 18V
- Current - Supply:
- 3.75mA
- Current - Cathode:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADR441ARZ-REEL7 FAQ
1.How can I place an order for ADR441ARZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR441ARZ-REEL7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADR441ARZ-REEL7 reliable?
The price and inventory of ADR441ARZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR441ARZ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADR441ARZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR441ARZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR441ARZ-REEL7?
ADR441ARZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR441ARZ-REEL7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADR441ARZ-REEL7?
For technical support, including ADR441ARZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR441ARZ-REEL7 requirements.
6.How does Aetrix verify that ADR441ARZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADR441ARZ-REEL7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADR441ARZ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADR441ARZ-REEL7?
All ADR441ARZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADR441ARZ-REEL7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADR441ARZ-REEL7 part is unused and in its original packaging.
Return procedure for ADR441ARZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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